Simplify 10/18

10/18 simplified is 5/9, after dividing the top and bottom by 2.

Result

Answer

\frac{10}{18} = \textcolor{#0b5c56}{\frac{5}{9}}

10/18 simplifies to 5/9.

  • Greatest common factor: 2
  • Decimal: \displaystyle 0.\overline{5} (the 5 repeats forever, about 0.5556)
  • Percent: 55.56%
10/185/9

Same amount, fewer parts

Step-by-step solution

The problem

\frac{10}{18}

  1. Find the greatest common factor. List the factors of each:
    Factors of 10: 1, 2, 5, 10
    Factors of 18: 1, 2, 3, 6, 9, 18
    The greatest common factor (GCF) is 2.

    \text{GCF}(10, 18) = 2

  2. Divide the top and bottom by 2. Dividing both by the same number keeps the value the same.

    = \frac{10 \div 2}{18 \div 2} = \textcolor{#0b5c56}{\frac{5}{9}}

All the working together

\begin{aligned} &\frac{10}{18} \\[8pt] &= \frac{10 \div 2}{18 \div 2} && \textcolor{#5b6660}{\textsf{divide by 2}} \\[8pt] &= \textcolor{#0b5c56}{\frac{5}{9}}\end{aligned}

10/18 in other forms

Simplest form5/9
Greatest common factor2
Decimal0.555… (the 5 repeats forever)
Percent≈ 55.56%
Equal fractions15/27, 20/36, 25/45, 30/54

Fractions over 18 simplified

FractionSimplest formDecimal
1/18already simplest0.0555…
2/181/90.111…
3/181/60.1666…
4/182/90.222…
5/18already simplest0.2777…
6/181/30.333…
7/18already simplest0.3888…
8/184/90.444…
9/181/20.5
10/185/90.555…
11/18already simplest0.6111…
12/182/30.666…
13/18already simplest0.7222…
14/187/90.777…
15/185/60.8333…
16/188/90.888…
17/18already simplest0.9444…

Frequently asked questions

What is 10/18 in simplest form?

10/18 simplifies to 5/9. Divide the top and bottom by 2, their greatest common factor: 10 ÷ 2 = 5 and 18 ÷ 2 = 9.

What is the greatest common factor of 10 and 18?

The GCF of 10 and 18 is 2 – the biggest number that divides both with nothing left over.

Is 10/18 equal to 5/9?

Yes. Both are 0.555… (≈ 55.56%). Simplifying changes how the fraction is written, not its value.

More fractions to simplify

Any other fraction or mixed number: use the Simplify Fractions Calculator.